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Old 22nd May 2006, 07:50 PM   #1
murray
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Default Units and scale

Can you set the units in Ac3d eg mm, or metres so you can model to scale when modelling objects

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Old 23rd May 2006, 08:23 AM   #2
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I send all my stuff finally to VRML. In VRML a value of 1 = a meter. So I set the major grid to 1 and the snap grid to .1.

Everything then is built at these settings unless i need to combine stuff or adjust things ... then I will alter the snapgrid to smaller values. Or if working with a terrain ... then I may take the major grid to 10 or more and the snapgrid to 1.

No idea what scales are used in the various games though.

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Old 24th May 2006, 03:44 AM   #3
murray
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Interesting.. i just created a cube 10cubed and brought it into rhino (set the rhino app units to mm) the cube measures 10mm BUT if i set the rhino units then repeat the import process to metres it reads it as 10m

However if i repeat the same proceedure in 3dmax when i set the app units to metres it reads 10m BUT if i set the app units to mm it reads 1000mm

So it seems safer to use metres as the file units or think of units in ACD3 as metres..

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Old 24th May 2006, 07:07 AM   #4
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Just out of interest murray, I created a 1 unit cube (Ac3d settings I normally use 1,0.1) and exported it as a .obj and a .lwo file. Loaded it into Lightwave. Lightwave tells me dimensions of the cube are 1 metre ... which is what I always assume for vrml.

However, depending on the zoom level in Lightwave, the major and minor grid changes values. So for example setting the zoom to *fit all* the cube is *2* major grid units high and wide ... but it always tells me it is a one metre object. Same for both .obj and .lwo



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Old 24th May 2006, 09:42 AM   #5
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AC3D stock unit is the meter I've always thought. It was mentioned here ages back.
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Old 24th May 2006, 03:50 PM   #6
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If that's the default unit, why is the surface area of one of my models something like -.1H00 or thereabouts?
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Old 24th May 2006, 04:36 PM   #7
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sounds like some that autocad would have. because I know in autocad you can setup the different settings to be like a meter a foot or radius and diameter.
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Old 25th May 2006, 03:30 PM   #8
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I think that there would only be real scale if it was meant for things to be built in real life.
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